Convert Length from Miles to Mils (mi to mil)

Mile to Mil Conversion Formula

Example

Let's convert 5 Mile (mi) to Mil (mil).

Using the formula:

Therefore, 5 Mile (mi) is equal to 316800000 Mil (mil).

How many miles are in one mil? One Mil (mil) contains 1.5782828282828282828× 10^-8 Miles (mi) — the inverse of the factor above. Multiplying by 63360000 takes you from miles to mils; multiplying by 1.5782828282828282828× 10^-8 brings you back.

Put in words: one mile equals 63360000 mils, so the mile is the larger unit of this pair. Converting between them never changes the amount of length being measured — only the size of the unit you count it in.

What is a Mile (mi)?

A mile (mi) is a common unit of length used in the imperial and US customary systems of measurement.

The official definition of a mile is 5,280 feet (ft). The plural form is miles.

Where Did the Word "Mile" Come From?

The word "mile" has ancient roots, originating from the Latin phrase "mille passus," which translates to "a thousand paces."

In ancient Rome, one pace was measured as two steps (one left and one right). The Roman mile was therefore 1,000 paces, which equals approximately 4,850 feet—slightly shorter than the modern mile.

What's the Difference Between a Statute Mile and a Nautical Mile?

Not all miles are created equal. While most people are familiar with the land mile, there is also a separate measurement used for air and sea travel.

The Statute Mile (Land Mile)

The commonly used mile on land is the statute mile, which is officially defined as 5,280 feet. This measurement is used for driving distances and most other land-based activities in the imperial system.

The Nautical Mile (Air and Sea)

The nautical mile is used for navigation in aviation and maritime settings. It is based on the Earth's circumference and is equal to one minute of arc of latitude. A nautical mile is longer than a statute mile.

Here's a quick comparison:

• 1 Statute Mile = 5,280 feet
• 1 Nautical Mile = approximately 6,076 feet (or about 1.15 statute miles)

Why Are There 5,280 Feet in a Mile?

The seemingly random number of 5,280 feet in a mile comes from English history. In 1593, the English Parliament, under Queen Elizabeth I, passed a statute to standardize units of measurement.

The statute defined the official length of a mile as being equal to 8 furlongs. Since one furlong was already established as 660 feet, the calculation was simple:

• 8 furlongs × 660 feet = 5,280 feet

This decision solidified the length of the statute mile that we still use today in countries that follow the imperial system.

What is a Mil?

A mil is a tiny unit of length in the imperial system of measurement.

Its most crucial definition is simple: one mil is equal to one-thousandth of an inch (1/1000 or 0.001 inches).

The plural form of the unit is mils.

Where Does the Name 'Mil' Come From?

The name "mil" comes from the Latin word millesimum, which means "thousandth"—a perfect fit for a unit that represents 1/1000th of an inch.

In engineering and manufacturing, especially in the UK, you might also hear a mil referred to as a thou. This nickname helps prevent confusion with metric units, such as the millimeter.

What is a Mil Used For?

The mil measurement is essential in industries where precision is key, even over minimal distances.

To give you some perspective, a human hair is about 2 to 4 mils thick.

This unit is commonly used to specify the thickness or diameter of:

• Thin materials like plastic bags and foils
• Coatings, such as layers of paint or plating
• Paper and cardstock
• Wires and electrical conductors
• Manufacturing tolerances for electronic parts, like printed circuit boards (PCBs)

Mil vs. MM: What's the Difference?

It's crucial not to confuse the imperial mil with the metric millimeter (mm). A millimeter is a much larger unit of measurement.

Here's a simple breakdown of the mil vs. mm conversion:

• 1 mil = 0.0254 mm
• 1 mm = 39.37 mils

As you can see, one millimeter is nearly 40 times larger than one mil.

It is crucial to specify the units used in technical specifications to avoid significant mistakes.

Mile to Mil Conversion Table

Here are some quick reference conversions from Mile (mi) to Mil (mil):